Types of input-output devices
- 4. Computer cannot understand our language because it understands only machine language and it can be possible using some devices called input devices. When we work with a computer, we enter data and give instructions to the computer by using these devices. These devices convert data and instructions into the form that can be easily recognized by the computer.
- 5. MOUSE KEY -BOARD SCANNER JOYSTICK MICRO- PHONE LIGHT- PEN TRACK-BALL DIGITIZER TOUCH- SCREEN
- 6. It is the pointing device used to insert instructions to the Computers. It is hand held device that controls the pointer on the screen. It has two buttons i.e. left and right button and one scrolling wheel. With the help Of mouse you can draw images, Select options and move and text Images.
- 8. A keyboard is the set of typewriter like keys that enables you to enter data into a computer and other devices. Computer keyboards are similar to electric- typewriter keyboards but contain additional keys. Keyboard is merely a collection of momentary switches.
- 10. A scanner is a device that captures images from photographic prints, posters, magazine pages, and similar sources for computer editing and display. Scanners come in hand-held, feed-in, and flatbed types and for scanning black-and-white only, or colour. SCANNER:
- 12. A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Joysticks are often used to control video games, and usually have one or more push-buttons whose state can also be read by the computer. Joysticks are also used for controlling machines such as cranes, trucks, underwater unmanned vehicles,.
- 13. A micro-phone is an input device used to inputting voice signal into the computer. Micro-phones are commonly used for live chats. Micro-phones are also used to record voice in the computer.
- 15. A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's CRT display. It allows the user to point to displayed objects or draw on the screen in a similar way to a touch-screen but with greater positional accuracy.
- 16. o Track ball is an input device that is mostly used in notebook or laptop computer, instead of mouse. o It looks like an upside-down mouse. o The onscreen pointer is moved by the trackball with a thumb or finger o Since the whole device is not moved, a track ball requires less space than a mouse.
- 17. Digitizer is an input device which converts analog information into digital form. Digitizer can convert a signal from the television or camera into a series of numbers that could be stored in a computer. They can be used by the computer to create a picture of whatever the camera had been pointed at. Digitizer is also known as Tablet or Graphics Tablet.
- 18. Touch-screen is the easiest way to input data on the computer. Touch-screen allow the user to select the items by touching the screen at appropriate spot. The screens are sensitive to pressure; a user interacts with the computer by touching pictures or words on the screen.
- 20. Computer is fed with a lot of data to be processed and organised. The data has been processed into useful form is called output. Output is a result we get through output devices.
- 21. PRINTER MONITOR SPEAKERS PROJECTOR PLOTTER FLAT -PANEL
- 22. A printer is any device that prints text or illustrations on paper. A printer is a peripheral which makes a persistent human readable representation of graphics or text on paper or similar physical media.
- 26. A monitor or a display is an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display thin panel, while older monitors used a cathode ray tube about as deep as the screen size.
- 27. Speaker is an important part of a computer system. Some systems have a built-in speaker, though they are small in size. Speaker is an essential part of a computer because they can notify about various system notifications through various sounds.
- 28. A projector or image projector is an optical device that projects an image onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers.
- 29. Plotter is a well known output device which produce high quality graphics in multiple colour. Plotter is used to create maps, charts etc. on a paper sheet. A plotter gives a hard copy of the output.
- 30. The flat-panel display refers to a class of video devices that have reduced volume, weight and power requirement in comparison to the CRT. You can hang them on walls or wear them on your wrists. Current uses of flat-panel displays include calculators, video games, monitors, laptop computer, graphics display.
- 31. INPUT DEVICES OUTPUT DEVICES An input device is any hardware device that sends data to a computer, allowing you to interact with and control the computer. An input device can send data to another device but it cannot receive data from another device. Examples of input devices are mouse, keyboard, scanner etc An output device is any peripheral that receives data from a computer, usually for display, projection. An output device can receive data from another device, but it cannot send data to another device. Examples of output devices are printer, monitor, projector etc.